#include <stdio.h>

int main()
{
  
    int a[3][4] = {1,2,3,4,5,6,7,8,9,10,11,12};

    //定义一个指针变量p，保存a的地址
    int (*p)[3][4] = &a;// int[4][3]*

    printf("sizeof(*p) = %ld\n", sizeof(*p));
    printf("sizeof((*p)[0]) = %ld\n", sizeof((*p)[0]));

}